Question: Which extrasolar planet within the constellation Aquarius has the smallest radius?
Paraphrase: What is the name of the extrasolar planet with the smallest radius inside the Aquarius constellation?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q44559 . ?ent wdt:P2120 ?obj . ?ent wdt:P59 wd:Q10576} ORDER BY ASC(?obj)LIMIT 5 
Answer: TRAPPIST-1d, TRAPPIST-1h, TRAPPIST-1e, TRAPPIST-1c, TRAPPIST-1f